1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Feliz [49]
3 years ago
6

Solve by completing the square. x2-6x+8 Show solving steps please.

Mathematics
2 answers:
Karolina [17]3 years ago
6 0

Answer:

x = 2 , x = 4

Step-by-step explanation:

To solve the expression equate it to zero

x² - 6x + 8 = 0 ( subtract 8 from both sides )

x² - 6x = - 8

To complete the square

add ( half the coefficient of the x- term)² to both sides

x² + 2(- 3)x + 9 = - 8 + 9

(x - 3)² = 1 ( take square root of both sides )

x - 3 = ± \sqrt{1} = ± 1 ( add 3 to both sides )

x = 3 ± 1

Then

x = 3 - 1 = 2 or x = 3 + 1 = 4

devlian [24]3 years ago
4 0

Answer:

(x−2)(x−4)

Step-by-step explanation:

Let's factor x2−6x+8

x2−6x+8

The middle number is -6 and the last number is 8.

Factoring means we want something like

(x+_)(x+_)

Which numbers go in the blanks?

We need two numbers that...

Add together to get -6

Multiply together to get 8

Can you think of the two numbers?

Try -2 and -4:

-2+-4 = -6

-2*-4 = 8

Fill in the blanks in

(x+_)(x+_)

with -2 and -4 to get...

(x-2)(x-4)

Hope this helps! Also, if it's no trouble, can I have brainliest? Thanks! :D

You might be interested in
Expand <br> (–5a^2+2a+3)(4a^2–2a+1)
fiasKO [112]

Answer:

Step-by-step explanation:

a • (a - 2) • (2a - 1)

6 0
3 years ago
The sum of a square root of a number and 6 is the number
vodka [1.7K]

Answer:

8 is the number you seek

Step-by-step explanation:


4 0
3 years ago
How far apart are parallel lines m and n such that T (ΔXYZ) = (Rn ∘ Rm)(ΔXYZ)?
Alina [70]

Answer:

Step-by-step explanation:did u ever find the answer

4 0
3 years ago
Please answer all three questions asap
Whitepunk [10]

Answer:

70.0373

70.04

70.0373

Step-by-step explanation:

7 0
3 years ago
Given the trinomial 2x*2 + 4x + 4, predict the type of solutions. a. Two rational solutions b. One rational solution c. Two irra
OverLord2011 [107]

Answer:

d. Two complex solutions

Step-by-step explanation:

We have been given a trinomial 2x^2+4x+4 and we are supposed to predict the type of solutions of our given trinomial.

We will use discriminant formula to solve for our given problem.

\text{Discriminant}=b^2-4ac, where,

a =\text{Coefficient of }x^2,

b =\text{Coefficient of }x,

c =\text{Constant }

Conclusion from the result of Discriminant are:

D

D=0\text{ means one real zero with of multiplicity two}

D>0\text{ means two distinct zeroes}

Upon substituting our given values in above formula we will get,

\text{Discriminant}=4^2-4*2*4

\text{Discriminant}=16-32

\text{Discriminant}=-16

Since our discriminant is less than zero, therefore, out given trinomial will have two complex solutions and option d is the correct choice.

3 0
3 years ago
Read 2 more answers
Other questions:
  • X<img src="https://tex.z-dn.net/?f=x%5E%7B2%7D%20%2B%287%5Csqrt%7B3%7D%20%29%5E%7B2%7D%20%3D%282x%29%5E%7B2%7D" id="TexFormula1"
    9·1 answer
  • The list of digits below is from a random number generator using technology. Use the list of numbers to obtain a simple random s
    6·1 answer
  • Simplify (7x+2+8x^4)-(2x-5-8x^4)+3x+5x^4)
    15·1 answer
  • Explain how you could mentally find 8×45 by using the distributive property
    9·2 answers
  • If m(x)= 3/4(x) what is m(8x-16)
    9·1 answer
  • Can someone explain this to me please
    6·1 answer
  • Use the substitution method to solve the system of equations: y = x + 6; y = 2x + 1. Write the answer as a point.
    14·1 answer
  • spent $135 at the store. He bought a pair of pants for $27. Then he bought 9 shirts. If each shirt cost the same amount, how muc
    6·1 answer
  • HELP
    13·1 answer
  • Question:
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!